Anchor bolt set Celo MZK 6x41 with flange and SPS screw 4.5x50 mm, 50 pcs (model 9641MZKSZ)

Concrete expansion anchors Celo MZK 6x41 with flange paired with SPS 4.5x50 mm screws, 50 pieces, are designed for mechanical anchoring in concrete and solid masonry. The system uses a sleeve-type expansion dowel with a flange to distribute load on the fixture surface while the cooperating screw secures the attached element. This anchor set is intended for standard light to medium duty fixings such as fixtures, brackets, railings and similar installations in construction and renovation works.

Advantages

The Celo MZK 6x41 expansion anchors with flange combined with SPS 4.5x50 mm screws provide predictable mechanical expansion inside drilled holes, ensuring consistent pull-out resistance in solid concrete and masonry. The flange reduces the risk of the anchor pulling through softer fixture materials and eases positioning. Supplied in a pack of 50, the set is suitable for larger jobs and reduces the need for frequent repurchasing. The components are manufactured to match dimensions and fit for reliable installation when used according to recommended drill sizes and embedment depths.

Suitable for

• Fixing metal brackets, supports and small steel constructions to concrete walls or floors
• Mounting handrails, balustrades and staircase elements to solid masonry
• Attaching light fixtures, signage and cable trays to concrete substrates
• General renovation tasks requiring mechanical anchors in solid base materials

When it may not be suitable

This expansion anchor set is intended for use in solid concrete and solid masonry only; it is not designed for hollow block walls, lightweight aerated concrete without confirmation of suitability, or very soft substrate materials where sleeve expansion cannot develop adequate grip. For heavy structural loads, seismic zones or critical safety applications, use engineered anchors with documented performance ratings and consult relevant standards or a structural engineer.

Key specifications

• Anchor type: sleeve expansion anchor with flange
• Anchor nominal diameter: 6 mm
• Anchor length: 41 mm
• Screw type: SPS thread-forming/fastening screw
• Screw diameter: 4.5 mm
• Screw length: 50 mm
• Pack quantity: 50 pieces (anchors and matching screws)
• Intended base materials: solid concrete and solid masonry

How to use

Drill a hole into the concrete or solid masonry with the recommended drill diameter for a 6 mm sleeve anchor, ensuring the hole is clean and free of dust. Insert the flanged sleeve anchor flush to the fixture, place the fixture against the substrate and drive the SPS 4.5x50 mm screw through the fixture into the sleeve anchor. Tighten the screw to the torque recommended by the anchor manufacturer or until the anchor expands and clamps securely. Verify embedment depth and edge distances are met for adequate load capacity.

What to consider before purchase

• Confirm the substrate is solid concrete or solid masonry suitable for sleeve expansion anchors
• Check required drill diameter and embedment depth for the 6x41 anchor
• Verify screw length and diameter are appropriate for the combined fixture thickness and embedment
• Assess load requirements and edge/spacing constraints for the intended application

Usage recommendations

Use a clean, correctly sized drill bit and a blow-out or brush to remove drilling dust before insertion. Maintain required spacing from edges and between anchors to prevent substrate splitting. For safety-critical or heavy-duty applications consult manufacturer guidance or a structural engineer and follow local building codes.